The spinal cord is a long, tube-like structure that runs down the back, protected by the vertebrae of the spine. It is a crucial part of the nervous system, acting as a highway for signals between the brain and the rest of the body. These signals help control movements and sensations, allowing us to react to our environment. Made up of nerve fibers, the spinal cord is divided into sections that correspond to different parts of the body. Damage to the spinal cord can lead to serious issues, such as loss of movement or feeling, highlighting its importance in everyday life and overall health.